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(No Model.)

J. R. WHITNEY.

GORE POB. CASTING. y Y No. 354,287. Patented Deo. 1,41886- UNITED STATES PATENT OFFICE.

JOHN R. VHITNEY, OF RADNOR, DELAWARE COUNTY, PA.

cone FOR CASTING.

:SPECIFICATION forming part of Letters Patent No. 354,287, dated December 14, 1886.

Application filed July 2G, 1886.

To @ZZ whom, it may concern:

Be it known that I, JOHN R. WHITNEY, a citizen of the United States, residing in Radnor township, Delaware county, Pennsylvania, have invented certain new and useful Improvements in Casting, of which the following is a specification.

My invention relates to the manufacture of articles of east metal which it is desired to cast in wholly or partially separated divisions in the molds; and my invention consists of corepieces composed of thin llexible blades or sheets of refractory material, and a support for two or more edges thereof, so as to mai ntain the cores in proper position in the molds.

In the drawings, Figure l is a perspective view of a core-piece consisting of asand frame and thin core. Fig. 2 is a sectional view illustrating the construction of the corepiece, Fig. l. Figs. 3, 4, and 5 are views showing corcpieces in which the cores are supported by metal frames. Figs. 6, 7, 8, 'and 9 represent the cores in connection with side supports only. Figs. 10, 1l, and 12 illustrate bent cores in connection with bent supports.l Fig. 13 is a view illustrating .the use of the core-pieces in casting a two-part pulley.

In the manufacture of many articles it has frequently been desirable to cast at one time and in one mold various separate parta'which can be put together to make the articles-as, for instanee,rseparatc pulleys. Ithas also been desirable to cast articles with extremely narrow slots or recesses; but owing to the inability to properly support and use such thin cores or core-pieces as are requisite to effect such results they have not heretofore been accomplished. I have overcome this difficulty by the use of exceedingly thin lihus or sheets ot' refractory material as cores, and by supporting such sheets by means of frames orstand ards, so as to maintain them in proper position in the molds while casting.

The cores may be made from asbestus paper or felt, preferably waterproof, from mica,

- from paper, or other fabric carbonized, from paper or other fabric chemically prepared to resist the action of molten metal, or from extremely thin sheets of clay or other like refractory material.

The support for the core depends upon the Serial No. 209,136. (No mozlel.)

character of the latter and of the casting. In

some instances I use a frame of baked sand or ofnietal, which, being embedded in the sand of the mold, does not come in contact withthe molten metal; or I use rods or standards holding the side edges only of the cores, and these supports may be straight or curved,or of other shape, as circumstances require.

In Fig. l is represented a core, a, of thin refractory material, all the edges embedded in a frame or support, A, of sand. In making this core-piece I use the usual core-mold, B, Fig. 2, consisting of the two parts 3 3, inclosing the space x, in which the sand is to be packed, and I clamp between these parts the thin sheeta, constituting the core, the edges ex tending into the space :t 'and being embedded in the sand which is packed in the space, so that the sand, when it is hardened, constitutes a frame supporting the core at all theedges.

In Figs. 3 and et the supportA is shown as a metallic frame, each edge of the same consisting of a. strip folded on itself to form arecess, receiving the edge ofthe core a. y

In Fig. 5 the sides of the frame are shownas consisting of two fiat pieces riveted together upon the edges of the core.

In Fig. 6 the support is constructed to support the side edges only of the core, consisting of two upright posts or standards of metal ,sand, or other material.

In Figs. 7, S, and 9 the supports are rods, on which the thin core a is wrapped or coiled at the edges, and for storage or transportation the core Vmay be rolled upon one of the rods, as shown in Fig. 9. The supporting frame or standards may be of any desired shape.

In Figs. l, 3, 4, and 5 the frameis flat, and in Figs. 6, 7,8,and 9 the side supports are straight; but the frame may be bent, as shown in Fig. 10, or curved, as shown in Fig. 11, or the side supports may be curved, as shown in Fig. 12.

It will be seen that whether supported at all of the edges or at only two of the edges the core supported by the frame or standards is held in position, so that it will maintain its proper place inthe mold and properly divide the cast metal which flows against it. I have thus supported fine lilms of one-hundredth of Ico an inch in thickness, and have cast heavy castings with perfectly clean slits of like width.

The manner in which the core andits support is arranged in a mold is shown in Fig. 13, showing a mold for casting a two-part pulley, divided by thecores a, supported by frames A. In manufacturing other articles the cores will be similarly arranged.

Without limiting myself to the precise construction and arrangement of parts' shown, I claim- 1. A core-piece for molds, consisting o1" a core of thin refractory material, and supports for the edges of the core, substantially as de scribed.

2. The combination, with a core ol' thin refractory material, of a supporting-frame in which the edges of the core are secured, substantially as described.

3. The combination of a core of thin refractory material, and a support or frame of JOHN R. VHITNEY.

Vitnesses:

LINDLEY M. GARRIsoN, HENRY RAINEY. 

